Moderate Drinking and the Brain

Does moderate drinking cause physiological problems? We see a lot of misleading information in the media about the effects of alcohol. There have been studies linking consumption of alcohol to longer life expectancy. We have pointed out that the agents causing health benefits from drinking wine are the flavonoids in grapes. Alcohol is not the agent of health benefits.

A recent study published in the British Medical Journal reports that long-term studies show a negative effect in the brain of moderate drinkers. The study defined moderate drinking as weekly doses of 8 to 12 small glasses of wine, bottles of beer, or shots of liquor. It followed 527 British citizens for 30 years, and the subjects were “predominantly white middle-class men.”

The study showed that moderate drinkers were more likely than nondrinkers to develop brain changes that might precede or accompany memory loss. They also were more likely to show a more rapid decline in a language fluency test. Moderate drinkers were three times more likely than nondrinkers to show shrinkage of the hippocampus area of the brain–a change that accompanies dementia. Heavy drinkers showed the most shrinkage.